Robert ham



R. HAM..

Stoveppe Damper.

No. l95,340.

Patented Sept. 28, 1869.

idr-idd ,s/titles @sind @wird A ROBERT OF TROY, NEW YORK, ASSIGNOR TO PHlLO l?. STEW- ART, OF lSAME PLACE.

Letters Patent o. 95,340, dated September 28, 1869.

STO'VIEl-PIPE DAM'PER.

The Schedule referred to in these Letters Patent and making part of the same;

To all whom it may conce/rn:

Be it known that I, ROBERT HAM, of the city oi' Troy, in the county of Rensselaer, and State vof New York, have invented a new and improved Stove- Pipe Damper; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being hereby had to the accompanying drawings, which form and make a part of this', my specification, in which-` Figure 1 is a longitudinal vsection of the stove-pipe and damper;

Figure 2 is a cross-section of the same;

Figure 3 is an enlarged front elevation of the indicator; and

Figure 4 is a broken cross-section of the pipe and damper, showing a modification of the form of the pivot.

Letters of like name and kind refer to like parts 'in each of the'iigures..

The nature of my invention consists in forming a stove-pipedaxnper with pivots, secured at equidistant points upon opposite sides ofthe same, constructed in the forni of a-cone, with its apex outward, or with a shoulder, from which projects outward a journal hav ing parallel sides, so as to permit said pivots to be iuserted in the apertures in said pipe from vthe inside,.

p and, hy causing the damper to slightly spread the pipe,

enable said damper to be secured in any positionvby the inward spring of said v pipe against said shoulders or conical pivots.

In theannexed drawing- A represents the stove-pipe of usual form and construction.`

The damper B is a ilat circular disk of metal, of usual size and form, and has secured, at equidistant points upony its periphery, two pivots, cand c', which pass through corresponding openings in said pipe, and forni axial bearings for said-damper.

These pivots may bevof any desired shape, leither conical, shown in iigs. 1A and 2, or with parallel sides and a shoulder, as seen in tig. 4, but must be smallest yat their outer ends, so as to .pass through the openupthe conical pivots are used, the holes in said pipe should be ofsuliicent size, onlyto'admit the pointsof said piyots, after which the sides of said pipe may be brought into proper lposition by placing a set over one of said pivots, and striking a slight blow with a hammer upon sheet-metal inward. Y

Themanner of attaching the damper to the stovepipe is as follows, viz:

Suitable holes or apertures said se,t,'which will spread the holes and force the being made in opposite sides of the' pipe, the damper B is placed edgewise i within said pipe, and the long pivot ccaused to enter y .the long pivot c is inserted, as before, and said dan1p.

er pressed downward until in proper position within said pipe, when, by a slight blow ofthe hammerupon the outside of said pipe, the position of the pivot c will be indicated, and it may be forced through the sheet# metal by means of a set, in the usual manner.

It will be readily seen that the above-described damper is cheaper, more durable, and convenient than any other in use, as the disk and pivots can becast iu one piece instead of in two parts, as usually made; the damper can be more quickly applied-to the pipe, where it is not liable to get out `of order, and, when adjusted, -is held in place by the spring of the pipe, which causes sufficient friction upon the pivots to overcome the force of the draught.

Having thus fully set forth the nature and merits of my invention,

What I claim as new, and desire to secure by Letters Patent, isy The dampr B, having cast or otherwise attached thereto the pivots c and c', so constructed` as to perf mit of their insertion into the pivot-holes from within the pipe, and provided with shoulders or their equivalents, against which the inside of said pipe shall press,

substantially as and for the purpose herein shoum and described.

In testimony whereof, I have hereunto set my hand,-

this 16th day of January, A. D. 1869.

. ROBT. HAM.

Witnesses:

C. D. KELLUM, NV. J. KEEP. 

